<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>动画描边</title>
</head>
<body>
    <svg version="1.1" id="" width="710" height="554" xmlns="https://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
        x="0px" y="0px" viewBox="0 0 710 554" enable-background="new 0 0 710 554" xml:space="preserve" >
     
    </svg>
</body>
</html>